US20050101185A1 - Device for ducting electrical lines through the wall of a fuel tank - Google Patents

Device for ducting electrical lines through the wall of a fuel tank Download PDF

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Publication number
US20050101185A1
US20050101185A1 US10/470,056 US47005604A US2005101185A1 US 20050101185 A1 US20050101185 A1 US 20050101185A1 US 47005604 A US47005604 A US 47005604A US 2005101185 A1 US2005101185 A1 US 2005101185A1
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United States
Prior art keywords
carrier
contacts
fuel tank
sheath
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US10/470,056
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US7081012B2 (en
Inventor
Heiko Gensert
Dieter Hagist
Wolfgang Sinz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GENSERT, HEIKKO, HAGIST, DIETER, SINZ, WOLFGANG
Publication of US20050101185A1 publication Critical patent/US20050101185A1/en
Application granted granted Critical
Publication of US7081012B2 publication Critical patent/US7081012B2/en
Assigned to CONTINENTAL AUTOMOTIVE GMBH reassignment CONTINENTAL AUTOMOTIVE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIEMENS AKTIENGESELLSCHAFT
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Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00—Electrical connectors
    • Y10S439/933—Special insulation
    • Y10S439/935—Glass or ceramic contact pin holder

Definitions

  • the invention relates to a device for ducting electrical lines through the wall of a fuel tank, and in particular, having a carrier which is inserted into an opening in the fuel tank and closes it off in a sealing fashion, and having contacts which lead through the carrier to the outside of the fuel tank.
  • Devices for ducting electrical lines are used, for example, for a fuel pump and a level indicator and are known from practice.
  • a carrier is fabricated from plastic.
  • the contacts are pressed into the carrier until one end of the contacts protrudes on each side of the carrier, or the contacts are encapsulated by injecting molding when the carrier is manufactured and are thus embedded in a materially joined fashion in the carrier material.
  • electrical lines can be connected to the contacts on both sides of the carrier.
  • the carrier is clipped, for example, onto the opening of the fuel tank.
  • an elastomer seal is arranged between the fuel tank and the carrier.
  • a disadvantage of the known device is that fuel vapors can diffuse through the carrier and regions adjoining the contacts. As a result, fuel can escape from the fuel tank and enter the environment.
  • the invention discloses a device for ducting electrical lines through the wall of a fuel tank such that it ensures a particularly high seal of the carrier and of the contacts. This is accomplished in one embodiment according to the invention in that the carrier has at least one sheath, which is fabricated from glass or ceramic, for the contacts.
  • This configuration permits the escape of fuel through the carrier to be kept particularly small as glass or ceramic virtually completely prevents the diffusion of fuel vapors.
  • the sheath ensures sufficient isolation of the contacts.
  • the contacts which are usually fabricated from metal can be connected particularly reliably to glass and ceramic, gaps in the region of the contacts are avoided as a result of the invention.
  • the carrier therefore has a particularly good seal with respect to fuel vapors.
  • the contacts have a wide variety of cross sections, for example circular, oval or rectangular.
  • the carrier could be fabricated completely from ceramic, for example.
  • the carrier is of more particularly cost-effective design if it is fabricated from metal and connected to the sheath of the contacts in a gastight fashion.
  • emissions of fuel from the fuel tank can be reduced to virtually zero as a result of the invention.
  • a plurality of contacts could have a common sheath made of glass or ceramic.
  • the carrier has a particularly high degree of mechanical stability if, when there are a plurality of contacts, at least one of the contacts has a sheath which is separated from the other contacts by the material of the carrier.
  • connection of the carrier to the sheath is structurally simple if a region of the carrier which adjoins the sheath has a rough surface.
  • the contacts or the bushings made of steel may also have a rough surface.
  • connection between the sheath and the carrier can be reliably sealed if the region of the carrier which adjoins the sheath has at least one groove-like recess and if part of the sheath is arranged inside the groove-like recess.
  • the contacts or the bushings made of steel can also be connected to the sheath in a similar fashion.
  • pull relief for the contacts is structurally simple if a connecting element for a plug which is to be plugged onto the contacts is attached to the carrier in the region of the contacts.
  • the contacting element is preferably fabricated from plastic.
  • the ingress of spray water underneath the connecting element could lead to creepage currents between the contacts.
  • the ingress of spray water can be avoided if the connecting element which is to be arranged on the outside of the fuel tank has an elastomer seal which bears against the carrier.
  • the device according to the invention requires a particularly small number of components to be mounted if the connecting element which is to be arranged on the outside of the fuel tank has a circumferential bead and is prestressed with respect to the carrier by means of the bead.
  • the device according to the invention is structurally simple if the connecting element is connected to the carrier in a materially joined fashion.
  • the carrier fabricated from metal and the connecting element fabricated from plastic it is possible to produce the materially joined connection easily using an injecting molding method when the connecting element is fabricated.
  • the carrier can be embodied in the form of a closure lid, or welded into such a closure lid.
  • a seal is arranged between the closure lid and the fuel tank.
  • the closure lid is screwed to the fuel tank.
  • the seal of the fuel tank is improved if the carrier is welded or soldered to the fuel tank in a gastight fashion.
  • the carrier has particularly small radial dimensions if the carrier is of sleeve-shaped design and has an external diameter corresponding to the opening of the fuel tank.
  • the carrier is configured in a plate shape and has a centering device which projects into the opening in the fuel tank.
  • FIG. 1 shows a section illustration of a device according to the invention with a plate-shaped carrier.
  • FIG. 2 shows another embodiment of the device according to the invention.
  • FIG. 3 shows a sectional illustration of a device according to the invention with a sleeve-shaped carrier.
  • FIG. 1 shows an upper region of a fuel container 1 for a motor vehicle having a device for ducting electrical lines through the wall of the fuel tank 1 .
  • the device has a carrier. 3 which is inserted into an opening 2 in the wall of the fuel tank.
  • the carrier 3 is fabricated from steel and welded in a sealed fashion to the fuel tank 1 which is also fabricated from steel.
  • Pin-like contacts 4 made of metal are led through the carrier 3 .
  • the contacts 4 have a round cross section and are used, for example, to electrically connect a fuel pump arranged within the fuel tank 1 to an on-board electrical system of the motor vehicle, or for connecting a filling level sensor arranged in the fuel tank 1 .
  • the contacts 4 each have a sheath 5 made of glass or ceramic.
  • the carrier 3 has respective breakthroughs 6 with circumferential groove-like recesses 7 .
  • the sheaths 5 penetrate the groove-like recesses 7 and are connected in a gastight fashion to the carrier 3 and to the contacts 4 .
  • Connecting elements 8 , 9 are attached to both sides of the carrier 3 .
  • the connecting element 8 with is arranged on the outside of the fuel tank 1 is sealed with respect to the carrier 3 by means of an annular elastomer seal 10 .
  • the connecting elements 8 , 9 are fabricated from plastic and are prestressed with respect to the carrier 3 , or connected thereto in a materially joined fashion.
  • the carrier has a protruding centering edge 11 for its precise alignment with the opening.
  • FIG. 2 shows a device which differs from FIG. 1 in particular in that contacts 12 are each inserted into a bushing 13 .
  • the bushings 13 have sheaths 14 made of glass or ceramic and are arranged in breakthroughs 15 in a carrier 16 which is welded to the wall of the fuel tank 1 .
  • the breakthroughs 15 of the carrier 16 have a roughened surface here in order to secure the sheath 14 .
  • FIG. 2 shows that the connecting element 17 which is arranged on the outside of the fuel tank 1 has a circumferential bead 18 with which it is prestressed against the carrier 16 .
  • the connecting element 17 is connected to the carrier 16 by means of screws 19 .
  • FIG. 3 shows a device for ducting electrical lines through the wall of the fuel tank 1 , in which a carrier 20 which is welded into the opening 2 of the fuel tank 1 is of sleeve-shaped design.
  • Contacts 21 which lead through the carrier 20 are arranged within the sleeve-shaped carrier 20 and have a common sheath 22 made of glass or ceramic.
  • the sheath 22 is connected in a sealed fashion to the inside of the sleeve-shaped carrier 20 .
  • the contacts 21 have a rectangular cross section.

Abstract

The invention relates to a device for ducting electrical lines through the wall of a fuel tank (1), whereby a steel support (3) is materially connected to the wall of the fuel tank (1). Contacts (4) are introduced though the support (3). The contacts (4) have a sleeving (5) made from glass or ceramic. A leakage of fuel vapours from the fuel tank (1) is thus almost completely excluded.

Description

    CLAIM FOR PRIORITY
  • This application claims priority to International Application No. PCT/DE02/00144 which was published in the German language on Aug. 1, 2002.
    • TECHNICAL FIELD OF THE INVENTION
  • The invention relates to a device for ducting electrical lines through the wall of a fuel tank, and in particular, having a carrier which is inserted into an opening in the fuel tank and closes it off in a sealing fashion, and having contacts which lead through the carrier to the outside of the fuel tank.
    • BACKGROUND OF THE INVENTION
  • Devices for ducting electrical lines are used, for example, for a fuel pump and a level indicator and are known from practice. As a rule, a carrier is fabricated from plastic. The contacts are pressed into the carrier until one end of the contacts protrudes on each side of the carrier, or the contacts are encapsulated by injecting molding when the carrier is manufactured and are thus embedded in a materially joined fashion in the carrier material. Then, electrical lines can be connected to the contacts on both sides of the carrier. The carrier is clipped, for example, onto the opening of the fuel tank. In addition, an elastomer seal is arranged between the fuel tank and the carrier.
  • A disadvantage of the known device is that fuel vapors can diffuse through the carrier and regions adjoining the contacts. As a result, fuel can escape from the fuel tank and enter the environment.
    • SUMMARY OF THE INVENTION
  • The invention discloses a device for ducting electrical lines through the wall of a fuel tank such that it ensures a particularly high seal of the carrier and of the contacts. This is accomplished in one embodiment according to the invention in that the carrier has at least one sheath, which is fabricated from glass or ceramic, for the contacts.
  • This configuration permits the escape of fuel through the carrier to be kept particularly small as glass or ceramic virtually completely prevents the diffusion of fuel vapors. In addition, the sheath ensures sufficient isolation of the contacts. As the contacts which are usually fabricated from metal can be connected particularly reliably to glass and ceramic, gaps in the region of the contacts are avoided as a result of the invention. The carrier therefore has a particularly good seal with respect to fuel vapors. At the same time, the contacts have a wide variety of cross sections, for example circular, oval or rectangular.
  • The carrier could be fabricated completely from ceramic, for example. According to one advantageous embodiment of the invention, the carrier is of more particularly cost-effective design if it is fabricated from metal and connected to the sheath of the contacts in a gastight fashion. In particular, when the carrier is connected to a fuel tank by a wall made of metal, emissions of fuel from the fuel tank can be reduced to virtually zero as a result of the invention.
  • In the case of contacts which are fabricated from metal with a low melting point, according to another advantageous embodiment of the invention it is possible to prevent the contacts melting when the sheath is cast with glass if the contacts have a bushing made of steel in the region of their sheath. The connection between the bushing made of steel and the contacts can easily be configured in a gastight fashion by pressing or soldering, for example.
  • A plurality of contacts could have a common sheath made of glass or ceramic. However, according to another advantageous embodiment of the invention, the carrier has a particularly high degree of mechanical stability if, when there are a plurality of contacts, at least one of the contacts has a sheath which is separated from the other contacts by the material of the carrier.
  • The connection of the carrier to the sheath is structurally simple if a region of the carrier which adjoins the sheath has a rough surface. The contacts or the bushings made of steel may also have a rough surface.
  • According to another advantageous embodiment of the invention, the connection between the sheath and the carrier can be reliably sealed if the region of the carrier which adjoins the sheath has at least one groove-like recess and if part of the sheath is arranged inside the groove-like recess. The contacts or the bushings made of steel can also be connected to the sheath in a similar fashion.
  • According to another advantageous embodiment of the invention, pull relief for the contacts is structurally simple if a connecting element for a plug which is to be plugged onto the contacts is attached to the carrier in the region of the contacts. The contacting element is preferably fabricated from plastic.
  • The ingress of spray water underneath the connecting element could lead to creepage currents between the contacts. According to another advantageous embodiment of the invention, the ingress of spray water can be avoided if the connecting element which is to be arranged on the outside of the fuel tank has an elastomer seal which bears against the carrier.
  • The device according to the invention requires a particularly small number of components to be mounted if the connecting element which is to be arranged on the outside of the fuel tank has a circumferential bead and is prestressed with respect to the carrier by means of the bead.
  • The device according to the invention is structurally simple if the connecting element is connected to the carrier in a materially joined fashion. With the carrier fabricated from metal and the connecting element fabricated from plastic it is possible to produce the materially joined connection easily using an injecting molding method when the connecting element is fabricated.
  • In order to close off a mounting opening in the fuel tank, the carrier can be embodied in the form of a closure lid, or welded into such a closure lid. A seal is arranged between the closure lid and the fuel tank. The closure lid is screwed to the fuel tank.
  • The seal of the fuel tank is improved if the carrier is welded or soldered to the fuel tank in a gastight fashion.
  • According to another advantageous development of the invention, the carrier has particularly small radial dimensions if the carrier is of sleeve-shaped design and has an external diameter corresponding to the opening of the fuel tank.
  • In order to reduce the fabrication costs of the device according to the invention further, it helps if the carrier is configured in a plate shape and has a centering device which projects into the opening in the fuel tank.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention permits numerous embodiments. In order to understand the invention, drawings are illustrated and described below. In the drawings:
  • FIG. 1 shows a section illustration of a device according to the invention with a plate-shaped carrier.
  • FIG. 2 shows another embodiment of the device according to the invention.
  • FIG. 3 shows a sectional illustration of a device according to the invention with a sleeve-shaped carrier.
    • DETAILED DESCRIPTION OF THE INVENTION
  • FIG. 1 shows an upper region of a fuel container 1 for a motor vehicle having a device for ducting electrical lines through the wall of the fuel tank 1. The device has a carrier. 3 which is inserted into an opening 2 in the wall of the fuel tank. The carrier 3 is fabricated from steel and welded in a sealed fashion to the fuel tank 1 which is also fabricated from steel. Pin-like contacts 4 made of metal are led through the carrier 3. The contacts 4 have a round cross section and are used, for example, to electrically connect a fuel pump arranged within the fuel tank 1 to an on-board electrical system of the motor vehicle, or for connecting a filling level sensor arranged in the fuel tank 1. The contacts 4 each have a sheath 5 made of glass or ceramic. In order to accommodate the sheaths 5, the carrier 3 has respective breakthroughs 6 with circumferential groove-like recesses 7. The sheaths 5 penetrate the groove-like recesses 7 and are connected in a gastight fashion to the carrier 3 and to the contacts 4. Connecting elements 8, 9 are attached to both sides of the carrier 3. The connecting element 8 with is arranged on the outside of the fuel tank 1 is sealed with respect to the carrier 3 by means of an annular elastomer seal 10. The connecting elements 8, 9 are fabricated from plastic and are prestressed with respect to the carrier 3, or connected thereto in a materially joined fashion. The carrier has a protruding centering edge 11 for its precise alignment with the opening.
  • FIG. 2 shows a device which differs from FIG. 1 in particular in that contacts 12 are each inserted into a bushing 13. The bushings 13 have sheaths 14 made of glass or ceramic and are arranged in breakthroughs 15 in a carrier 16 which is welded to the wall of the fuel tank 1. The breakthroughs 15 of the carrier 16 have a roughened surface here in order to secure the sheath 14. Furthermore, FIG. 2 shows that the connecting element 17 which is arranged on the outside of the fuel tank 1 has a circumferential bead 18 with which it is prestressed against the carrier 16. The connecting element 17 is connected to the carrier 16 by means of screws 19.
  • FIG. 3 shows a device for ducting electrical lines through the wall of the fuel tank 1, in which a carrier 20 which is welded into the opening 2 of the fuel tank 1 is of sleeve-shaped design. Contacts 21 which lead through the carrier 20 are arranged within the sleeve-shaped carrier 20 and have a common sheath 22 made of glass or ceramic. The sheath 22 is connected in a sealed fashion to the inside of the sleeve-shaped carrier 20. The contacts 21 have a rectangular cross section.

Claims (16)

1. A device for ducting electrical lines through a wall of a fuel tank, comprising:
a carrier inserted into an opening in the fuel tank and closed off in a sealing fashion; and
contacts which lead through the carrier to outside of the fuel tank, wherein the carrier has at least one sheath which is fabricated from glass or ceramic, for the contacts, wherein
the height of the at least one sheath is less than or equal to the thickness of the carrier.
2. The device as claimed in claim 1, wherein the carrier is fabricated from metal and is connected to the sheath of the contacts in a gastight fashion.
3. The device as claimed in claim 1, wherein the contacts have a bushing made of steel in a region of the sheath.
4. A device for ducting electrical lines through a wall of a fuel tank, comprising:
a carrier inserted into an opening in the fuel tank and closed off in a sealing fashion; and
contacts which lead through the carrier to outside of the fuel tank, wherein the carrier has at least one sheath, which is fabricated from glass or ceramic, for the contacts, and
when a plurality of contacts exist, at least one of the contacts has a sheath which is fabricated from a different material of the carrier.
5. The device according to claim 4, wherein a region of the carrier which adjoins the sheath has a rough surface.
6. The device according to claim 4, wherein a region of the carrier which adjoins the sheath has at least one groove-like recess, and in that part of the sheath is arranged within the groove-like recess.
7. The device according to claim 4, wherein the contacts have a circular, oval or rectangular-shaped cross section.
8. The device according to claim 4, further comprising a connecting element for a plug, which is configured to be plugged onto the contacts is attached to the carrier in the region of the contacts.
9. The device according to claim 8, wherein the connecting element which is configured to be arranged on an outside of the fuel tank has an elastomer seal which bears against the carrier.
10. The device according to claim 9, wherein the connecting element which is configured to be arranged on the outside of the fuel tank has a circumferential bead and is prestressed with respect to the carrier by means of the bead.
11. The device according to claim 8, wherein the connecting element is connected with the carrier in a materially joined fashion.
12. The device according to claim 4, wherein the carrier is welded or soldered to the fuel tank in a gas-tight fashion.
13. (canceled).
14. The device according to claim 4, wherein the carrier is plate-=shaped and has a centering device which projects into the opening in the fuel tank.
15. The device according to claim 1, further comprising a connecting element for a plug, which is configured to be plugged onto the contacts, is attached to the carrier in the region of the contacts.
16. The device as claimed in claim 1, wherein the contacts have a bushing made of steel in a region of the sheath.
US10/470,056 2001-01-25 2002-01-18 Device for ducting electrical lines through the wall of a fuel tank Expired - Fee Related US7081012B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117976.6 2001-01-25
DE10117976A DE10117976A1 (en) 2001-01-25 2001-01-25 Device for the passage of electrical lines through the wall of a fuel tank
PCT/DE2002/000144 WO2002058954A1 (en) 2001-01-25 2002-01-18 Device for ducting electrical lines through the wall of a fuel tank

Publications (2)

Publication Number Publication Date
US20050101185A1 true US20050101185A1 (en) 2005-05-12
US7081012B2 US7081012B2 (en) 2006-07-25

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US10/470,056 Expired - Fee Related US7081012B2 (en) 2001-01-25 2002-01-18 Device for ducting electrical lines through the wall of a fuel tank

Country Status (8)

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US (1) US7081012B2 (en)
EP (1) EP1353818B1 (en)
JP (1) JP2004517457A (en)
AT (1) ATE284798T1 (en)
BR (1) BR0206671B1 (en)
DE (2) DE10117976A1 (en)
ES (1) ES2233794T3 (en)
WO (1) WO2002058954A1 (en)

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BR0206671A (en) 2004-01-13
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US7081012B2 (en) 2006-07-25
WO2002058954A1 (en) 2002-08-01
ATE284798T1 (en) 2005-01-15
DE50201775D1 (en) 2005-01-20
DE10117976A1 (en) 2002-08-22
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BR0206671B1 (en) 2010-12-28
EP1353818B1 (en) 2004-12-15

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